2014 Silverado vibration?

[Rattle22]

My truck has developed a vibration under hard acceleration. It has a 3.5" lift but I pretty certain thats not the problem. Went back to the shop that did the work they said people are complaining about the '14's vibrating from stock. I know what your thinking but 3.5" doesn't change the safe angle of the rear drive shaft to make the U-joints bind. Any body else's trucks vibrating lifted or stock?

[kazaman]

My truck has developed a vibration under hard acceleration. It has a 3.5" lift but I pretty certain thats not the problem. Went back to the shop that did the work they said people are complaining about the '14's vibrating from stock. I know what your thinking but 3.5" doesn't change the safe angle of the rear drive shaft to make the U-joints bind. Any body else's trucks vibrating lifted or stock?

Yes, same problem. From stock no, changes to the vehicle. Dealer forced balanced the tires, which was not the issue. Going back to the dealer Monday. I have stock 18" aluminum rims, earlier post was thinking it was the tires?

Which rear end do you have? I have the 3.08.

[Rattle22]

Ya pretty sure about the gears. Its the Z71. I get it 4wd too! Put it in 4wd and punch it, see if it dose it there also, just curious. The dealer says its the lift kit. Me and CIC (shop that did the lift) know its not. I did the lift through the dealer, they get trucks lifted and sell the them from CIC, they got 4 in front of their store now. CIC is gonna go get a stock truck and see. To prove its Chev and not the lifts.

[Rattle22]

The tires would be all the time. "Mostly" the fequincy of my plus the under power only suggests driveline.